Diode (NOT rectifier) vacuum tubes

Diode

Heated stabilizing diode intended for electronic stabilization, regulation, and measurement circuits by exploiting the dependence of cathode emission current on heater power.

Base

Not recorded

Socket

Not recorded

Heater

13 V

Sections

1

Diode

Indirectly heated television diode intended primarily for half-wave vision-signal detection, providing low-level signal rectification rather than power-supply service.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

1

Diode-Diode

OSRAM diode valve documented with operating characteristics and application guidance; available evidence does not justify a narrower classification than general diode service.

Base

Not recorded

Socket

B5

Heater

4 V

Sections

2

Diode

Osram single diode intended for detector and signal-rectification service in receiving equipment, with construction characteristic of early thermionic detector valves.

Base

Not recorded

Socket

B4

Heater

4 V

Sections

1

Diode-Diode

Miniature indirectly heated double diode with separate cathodes for low- and high-frequency detector service, with resonance extending to roughly 700 MHz.

Base

B7G

Socket

Not recorded

Heater

6.3 V

Sections

2

Diode

Battery-oriented single diode with a 1.4 V heater and high resonant frequency, intended for detector and low-level signal rectification in portable equipment.

Base

Miniature

Socket

B7G

Heater

1.4 V

Sections

1

Diode-Diode

AC/DC mains double diode intended for receiving-equipment detector and rectifier service.

Base

Not recorded

Socket

IO

Heater

10 V

Sections

2

Diode-Diode

Battery-operated double diode intended for detector and rectifier service in portable receiving equipment.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

2

Diode-Diode

Cossor double diode intended for receiving-equipment detector and rectifier applications, with two diode sections in one envelope.

Base

Not recorded

Socket

B7

Heater

4 V

Sections

2

Diode-Diode

AC-mains double diode intended for receiving-equipment detector and rectifier service.

Base

Not recorded

Socket

IO

Heater

4 V

Sections

2

Diode-Diode

Miniature double diode with separate cathodes for high-frequency detector and half-wave rectifier service, with resonance extending to approximately 700 MHz.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Diode-Diode

AC/DC mains double diode intended for receiving-equipment detector and rectifier service.

Base

Not recorded

Socket

Not recorded

Heater

6 V

Sections

2

Diode-Diode

Special double diode with elastically supported anodes whose impedance changes with acceleration, designed as an electrical accelerometer transducer for bridge measurement.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Diode

Osram diode intended for radio signal detection and rectification, providing a thermionic detector element for early receiving equipment.

Base

Not recorded

Socket

B7

Heater

4 V

Sections

1

Diode-Diode

Long-life ruggedized double diode with separate cathodes, suitable for high-frequency detector and related service to roughly 700 MHz.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

2

Diode

High-current indirectly heated diode for sweep, pulse, and demanding high-voltage circuits, with published operation to approximately 4 kV.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Diode

Miniature single thermionic diode for general detector and low-level rectifier service, using a conventional 6.3 V heater.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Diode

UHF thermionic diode intended for high-frequency signal rectification, combining low capacitance with operation suited to radio-frequency measurement and detection circuits.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Diode

RF measuring diode designed specifically for voltage measurement at frequencies to approximately 1 GHz, providing thermionic rectification for high-frequency instrumentation.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Diode

Subminiature indirectly heated single diode intended for detector and general signal-rectifier service in compact electronic equipment.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Diode

Single thermionic signal diode documented by RFT for general rectification and related electronic applications where a compact diode element is required.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Diode

RFT signal diode with an economical 6.3 V, 150 mA heater, intended for low-level rectification and related electronic functions rather than substantial power service.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Diode

RFT high-voltage thermionic diode with operation extending to approximately 2 kV, intended for specialized high-voltage rectification rather than ordinary signal detection.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Diode

RFT thermionic signal diode with a low-current 6.3 V heater, intended for signal rectification and related low-power electronic functions.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

1

Diode-Diode

Special-quality RF twin diode equivalent to 5726, designed for reliable high-frequency detector and switching service to roughly 700 MHz.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

2

Diode-Diode

Low-resistance dual diode designed for FM ratio detectors and related high-frequency detector circuits, with resonance around 700 MHz.

Base

Not recorded

Socket

B7G

Heater

6.3 V

Sections

2

Diode-Diode-Diode

Triple-diode receiving valve with three physical diode sections around a common cathode, enabling multiple detector, discriminator, AVC, or related signal-processing functions.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

3

Diode-Diode

Double diode designed for detector and rectifier service, providing two physical diode sections for receiving applications.

Base

Not recorded

Socket

B4

Heater

6.3 V

Sections

2

Diode-Diode

Indirectly heated twin diode with two separate cathodes, intended for detector and rectifier applications in receiving equipment.

Base

Not recorded

Socket

P8A

Heater

6.3 V

Sections

2

Diode-Diode

Double diode with separate cathodes and internal screening, intended for detector and rectifier service with improved isolation between sections.

Base

Not recorded

Socket

IO

Heater

6.3 V

Sections

2

Diode-Diode

European duodiode with separate cathodes intended for detector and rectifier functions in receiving equipment.

Base

Not recorded

Socket

B5

Heater

6.3 V

Sections

2

Diode-Diode

Double diode with separate cathodes and internal inter-section screening, designed for detector and rectifier service.

Base

RIMLOCK

Socket

B8A

Heater

6.3 V

Sections

2

Diode-Diode

Indirectly heated dual diode designed for detector, phase-comparator, and rectifier service, with useful high-frequency operation to roughly 700 MHz.

Base

MINIATURE

Socket

B7G

Heater

6.3 V

Sections

2

Diode

Educational thermionic diode from a teaching-tube set, intended to demonstrate basic diode current behavior and electrode effects in laboratory instruction.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

1

Diode

High-voltage power diode designed for rectifier and shunt-diode service, intended for specialized power and industrial electronic applications.

Base

Not recorded

Socket

Not recorded

Heater

13 V

Sections

1

Diode

High-voltage power diode intended for rectifier service and related special applications requiring substantially greater voltage handling than receiving detector diodes.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Diode

High-voltage thermionic power diode designed for specialized rectifier service and other applications requiring substantial inverse-voltage capability.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Diode

Experimental high-vacuum diode designed for laboratory study of thermionic emission, space charge, and magnetic-field effects rather than normal receiver operation.

Base

Not recorded

Socket

B4B

Heater

4 V

Sections

1

Diode

Cold-cathode glow-discharge switching diode family for relaxation oscillators and switching circuits, using a pronounced difference between breakdown and maintaining voltage.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Diode

155 V oxide-cathode cold-cathode switching diode for relaxation oscillators and trigger circuits, maintaining its glow discharge near 58–60 V after breakdown.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Diode

Subminiature cold-cathode switching diode for DC switching and relaxation oscillators, using an oxide-coated cathode and slight preionization for reproducible firing.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Diode

Directly heated tungsten noise diode designed as a calibrated broadband noise source for measuring radio-receiver sensitivity over a wide frequency range.

Base

Not recorded

Socket

Not recorded

Heater

2.5 V

Sections

1

Diode

Precision cold-cathode switching diode with approximately 135 V striking voltage, intended for triggering, threshold detection, and low-current glow-discharge switching.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Diode

Ferranti saturated-emission diode; typical filament 1.65 V / 0.320 A; maximum filament voltage 1.8 V; octal base.

Base

Not recorded

Socket

Not recorded

Heater

Not recorded

Sections

1

Diode

Directly heated guard-ring demonstration diode with coaxial electrodes, designed for educational investigation of saturated thermionic current and related electron-flow phenomena.

Base

Not recorded

Socket

IO

Heater

6 V

Sections

1

Diode

Rare-gas-filled microwave noise diode designed as a calibrated noise source for measurements in the 3 cm wavelength band.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Diode

Rare-gas-filled microwave noise diode designed as a calibrated noise source for measurements in the 10 cm wavelength band.

Base

Not recorded

Socket

Not recorded

Heater

2 V

Sections

1

Diode

Directly heated noise diode designed as a calibrated standard noise source for metric-wave measurements, with recommended operation to approximately 300 MHz.

Base

NOVAL

Socket

B9A

Heater

1.85 V

Sections

1